Ventilating device



Feb. 6, 1940. F. J. KURTH VENTILATING DEVICE Filed Aug. 7, 1937 INVENTOR fiawvz f Mfr/9 Z mmar ATTORNEY Patented Feb. 6, 1940 I UNITED STATES PATENT. OFFICE YVENTILATING DEVICE Franz J. Kurth, New York, N. Y. Application August '1, 1927, Serial No. 157,842

1 Claims. (Cl. 98-33) My invention relates to ventilating devices for booth. In the drawing, Fig. 1 is a central vertiventilating closed spaces. The principal object cal section through the complete device shown of the present invention is to so design the venmounted in the ceiling of a telephone-booth. tilating device, that simultaneously with the ex- Fig. 2 shows partly in elevation and partly in haust of the vitiated air fresh air is supplied to section the two fan elements.

the closed space, the means for exhausting the As shown, the device comprises 9. preferably vitiated air and for supplying the fresh air being y d i a ut asin l adapt d to be mounted operated by the same source of energy, in the ceiling 2 of a telephone-booth, to which In accordance with the. present invention, I use it is secured by mea s of bm members ShOWn two sets of fan elements each constituting a sepat 3 and 3. 10

arate fan wheel, which fan wheels are preferably Within t e Oute eas in Spaced relation concentrically mounted within a casing on the thereto, is Provided an inner easing Shown at shaft of an electric motor and which are so which P s both belOW and above the Outer designed that by one of the fan-wheels a sucl forming therewith an annular P 16 tion is produced whereby the vitiated air is exway 5. o the uppe e d of t e oute casin is hausted from the closed space, whereas by the secu ed an ve t p member 6 co p s n a other fan-wheel fresh outside air is drawn into plurality ef'lediel firms which extend through the closed space. the inner casing member 4 and, within the lat- Another object of the present invention is to Support a Small electric o o S w at '20 so distribute the fresh outside air inside the closed on the Projecting Shaft 3 Said meter s 86- space as to prevent all sensation of draft being Cured & disk 9 Provided W Spider a ms '"I felt by the person or persons occupying the closed Carrying at their ends a cylindrical Shell ll e y space. Therefore, I provide at the inner end of Surrelmding t inner easing be which the the casing enclosing the two fan-wh 1 and th said shell may rotate. By shell II are carried motor for operating the same an air distributing -b des shown at Whereas 0n the Periphery device composed f a l l t of mutually spaced of shell II are provided fan blades shown at l3. hollow flaring members and disposed at some The fan-blades I! are so designed that as the distance away from the said fan-wheels so that Shell ll es, y Will Produce pwa d the desired air distributing effect is obtained. draft. thereby causing the fl p ards 30 This invention is more especially adapted to be Within the inner easing 4 in the direction the so used in connection with telephone-booths, and arrows Shown at 0n t Other hand, the a the device embodying the invention is so designed blades I3 vi d on the pe ip e y of s e l I I are that its parts can be readily assembled and the es gned to draw outside air into the passa e device as a single unit mounted in the ceiling 5 between the inner an u e easing causing the of th telephone-boofl air to flow downwards in the direction of the ar- When thus used for a telephone-booth, I prefrows Shown at erably provide intermediate the fan-wheels and At its Projecting pp e e inner easing the air-distributor an electric light-socket adapt- 4 carries, is formed w t a hood '4 which is ed to receive a bulb which when switched on win Spaced from the upper end of outer casing I o 40 heat by its radiation the surrounding air, thus permit Outside ai to be drawn into the passagecreating an upward flow of the same. At the n/ y e rotating fa d s A ve the same time, thereby the heat becomes dissipated e Sp d therefrom, is Provided an r and thus is prevented from heating the telephone ed d '5 S0 des ed t t e drawn up booth. wards by the fan-blades l2 will flow out with- Preferably, the electric motor for driving the Out any chance of this air minglin W t t ttwo fan-wheels and the said light-bulb are conside air drawn in between the hood I4 and the nected to the same source of electric energy in upper end of the outer casing I. such a manner, that upon the door of the tele- To the lower ends of the outer and inner casphone-booth being closed, simultaneously the ing l and 4 respectively is detachably secured light will be switched on and the driving motor an air distributing device designated D. which, set into operation. as shown, comprises a plurality of mutually For a better understanding of my invention spaced hollow flaring members shown at l6, I1, I refer to the appended drawing showing by way I8, l9 and 20. These members, as will be of example an embodiment of the invention seen, form between them flaring passageways. adapted for use in connection with a telephone Through the two larger passageways formed between the outer members It and I! the air, as indicated by the arrows, flows downwards into the enclosed space of the telephone booth. This is the fresh outside air drawn into the passageway 5 by the fan-blades it above referred to. Through the smaller passageways formed between the members I8 and I9 and i9 and 20 and through the innermost member 20, air flows upwardly through the inner casing I to escape at the top below the inverted hood I5. This is the vitiated air, which is drawn out from the enclosed space or the telephone booth.

Within the inner casing 4, intermediate the fan-blades "i2 and the air-distributor D is suspended on spider arms 2| an electric light socket shown at 22, which carries a bulb 23 extending closely down to the inner hollow members of the air distributor D. While thus the light rays emanating from the bulb 23 will be thrown downwards through the open pasagewaysbetween said inner hollow members, the heat produced by the bulb will cause an initial upward flow of air and will be entirely dissipated by the increased fiow generated by the revolving fan-blades l2 within the casing B.

The spider arms 2| are fastened at their outer ends to the outer casing member i and extend through the inner casing member a into the latter where they support the lamp socket 22. These spider arms and the arms of the member 6 serve not only as supports for the lamp socket 22 and the motor I, respectively, but cooperate with each other and with said casing members to support the inner casing member 4 within the outer casing member in desired concentric, spaced relationship thereto.

At 24 and 25 are shown stays for holding the hollow flaring members I! and i9 and 20 in position relative to the fixed members i6 and i8.

Between the rotatable shell II and the outer wall of the inner casing 4 there is just enough tolerance to permit unimpeded rotation of the shell relative to said casing while practically preventing any leak of air rrom within the inner casing I to the annular passageway 5, or vice versa.

While I have shown my invention as adapted for use in connection with a telephone booth, it can obviously be modified for other uses without any departure from the gist of the inventive concept.

I claim:

In a device of the character described, an 10 outer casing, an inner casing within said outer casing and spaced therefrom to provide a passageway between said casings, said irmer casing comprising separate cylindrical sections disposed in end-to-end spaced apart relationship, a rotatable cylindrical shell mounted in axial alinement with said inner casing sections and closing the space between the ends of said casing sections, the end portions of said shell being disposed in overlapping relationship to the adjacent end portions or said inner casing sections, the overlapped portions of said shell and said inner casing sections being disposed closely adjacent to each other, fan blades interiorly and exteriorly of said shell and rotatable therewith for circulating air through said inner casing and through said passageway, respectively, a plurality of arms carried by said outer casing and extending through said inner easing into the latter, a motor mounted on said arms within said inner casing and operatively connected to said shell for supporting and rotating the same, another plurality of arms carried by said outer casing at a point spaced longitudinally therealong from said first mentioned arms and extending through said inner easing into the latter, and a lamp socket mounted on said second mentioned plurality of arms within said inner casing, said first and second mentioned pluralities of arms cooperating with said casings and with each other to support said inner casing in spaced, concentric relationship to said outer casing.

FRANZ J. KURTH. 

